BACKLIGHT UNIT, AND LIQUID CRYSTAL DISPLAY DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a high-quality backlight unit in which thermal deformation of a front frame hardly occurs, and to provide a liquid crystal display device.SOLUTION: The backlight unit 3 has a light guide plate 30 and linear light sources 70 arranged in opposition on the side face of the light guide plate 30 housed in a case 10 with one face open, and a front frame 100 is installed covering the periphery part of the light guide plate 30 on the opening part 12 of the case 10. The front frame 100 is constructed of a plurality of plates 102-105, and at least one of the plates 102-105 is arranged with clearances 106-109 between the other plates so that its expansion may not be suppressed by other plates when it expands by heat generated from the linear light sources 70.